Energy Efficient Street Lighting : Energy Transition

Energy Efficient Street Lighting : Energy Transition

1- Introduction to the energy transition in public lighting

The energy transition is a major issue for our society, and public lighting is no exception. In this article, I will present to you the technical highlights of the energy transition in public lighting. We will examine technological advances that can improve energy efficiency, reduce costs and adopt more sustainable solutions.

2- Understand the technical strengths of public lighting

One of the main technical strengths of public lighting is the use of LED technology. LEDs, or light-emitting diodes, offer many advantages over traditional light bulbs. They are more energy efficient, have a longer lifespan and produce more uniform and directional light. Thanks to LED technology, it is possible to significantly reduce the energy consumption of public lighting while maintaining optimal light quality.

Another technical highlight is the remote management and control of public lighting. Thanks to centralized management systems, it is possible to monitor and control each lamp individually. This makes it possible to adjust the brightness according to actual needs, optimize energy consumption and reduce maintenance costs. Remote management and monitoring also makes it possible to detect faults more quickly and repair them more efficiently.

3- LED technology in public lighting

Today, LED technology and electronic management equipment respond to a number of challenges such as reducing energy consumption, light pollution and greenhouse gas (GHG) emissions, while improving the service provided. to citizens by installing public lighting.

3.1 LED characteristics

Light and electrical power adjusted as needed;

• LED modules factory adjusted on demand and modifiable on site;
• Operating life > 10 years;
• Lowering ranges and stages on demand from 0 to 100% autonomous;
• Electronic management on the luminaire and additional to other equipment;

3.2 Advantages of LED technology

LED technology has many advantages in public lighting:

• LEDs are much more energy efficient than traditional light bulbs. They can reduce the energy consumption of street lighting by up to 50%, resulting in considerable savings on electricity bills.
• LEDs have a much longer lifespan than traditional bulbs. While incandescent bulbs need to be replaced regularly, LEDs can last up to 100,000 hours. This significantly reduces maintenance costs and downtime due to lamp failure.
• LEDs produce more uniform and directional light, which helps reduce light pollution. LEDs can be used to specifically illuminate needed areas, thus avoiding wasted light and preserving nocturnal biodiversity.

4- Remote management and control of public lighting

Remote management and control of public lighting are essential tools to optimize energy efficiency and reduce costs. Thanks to centralized management systems, it is possible to monitor and control each street lamp individually.

One of the advantages of remote management is the possibility of adjusting the brightness according to actual needs. For example, it is possible to reduce the brightness during off-peak hours at night when traffic is light, then increase it during peak hours. This allows for significant energy savings.

In addition, remote management allows failures to be detected more quickly and repaired more efficiently. When a lamp fails, the management system sends an alert and indicates the exact location of the failure. This allows maintenance teams to respond quickly and reduce service interruptions.

Public lighting presents several technical solutions already in service:

• Management and modulation of power reduction ranges and thresholds by the installation of electronic modules and by IoT (Internet of Connected Things) networks such as 5G, Lora, Bluetooth, Zigbee, etc.;
• Control by radio-synchronized clock (GPS or long waves or connected) or remote management by power line;

Public lighting professionals have other solutions, such as:

• Interconnected clocks;
• Programming near lights and clocks with smartphone;
• Remote management of lighting fixtures via the internet (SIM card);
• Dynamic control of installations by camera;

5- Setting up time-dependent lighting profiles

The implementation of time-dependent lighting profiles is another technical solution to optimize the energy efficiency of public lighting. Time-dependent lighting profiles allow brightness to be automatically adjusted based on the time of day.

For example, it is possible to reduce the brightness during off-peak hours at night when traffic is light, then increase it during peak hours. This approach allows significant energy savings to be made by adapting lighting to actual needs.

Additionally, time-dependent lighting profiles allow you to create a different ambiance depending on the time of day. For example, it is possible to set a warmer and softer brightness during the evenings to create a more friendly atmosphere.

This diagram shows an example of a proposed dimming profile for a Philips LED driver. This profile guarantees the proper functioning of the luminaires and saves energy by providing just the right lighting (notion of fair lighting).

6- Explore solar lighting solutions

Solar lighting is another technical solution for the energy transition in public lighting. Solar lighting systems use energy from the sun to power street lights, significantly reducing energy consumption.

Solar street lights are equipped with solar panels that capture solar energy during the day and store it in batteries. This energy is then used to power the lamps during the night. Solar street lights are self-contained and do not require a grid connection, making them ideal for remote areas or places where installing a grid would be costly.

Solar street lights also offer great flexibility in terms of placement. They can be installed in places where access to electricity is limited or impossible, such as parks, cycle paths or parking lots.

Interest in autonomous solar lighting

Around ten years earlier, the first installations were dedicated to isolated places.

Today, innovative solar lighting solutions exist to effectively and sustainably illuminate parking areas, soft roads, secondary and residential roads, etc.

Indeed, the technology of LEDs, batteries and photovoltaic panels is mastered in terms of lifespan and energy performance.

In addition, the autonomous solar masts are configurable regarding lighting management and can receive additional equipment such as detection, remote management, cameras, etc.

or even communicate with each other.

7- Future trends and technological advances in public lighting

Public lighting continues to evolve with new trends and technological advances. Here are some of the future trends to watch:

7.1. Smart lighting

Smart lighting uses advanced sensors and control systems to automatically adjust brightness based on environmental conditions. For example, street lights can detect the presence of pedestrians and automatically increase the brightness. This approach saves even more energy by adapting lighting to actual needs.

7.2. Integration of public lighting with other infrastructure

Increasingly, public lighting is integrated with other urban infrastructure for more efficient management. For example, street lights can be equipped with sensors to monitor air quality or road traffic. This allows for more holistic management of urban space and better coordination of services.

7.3. The use of artificial intelligence and machine learning

Artificial intelligence and machine learning can be used to analyze data collected by street lighting systems and optimize performance. For example, artificial intelligence can predict lamp failures by analyzing energy consumption patterns. This allows repairs to be planned proactively and reduces service interruptions.

These future trends show that street lighting will continue to evolve to become smarter, more efficient and more sustainable.

8. Challenges and considerations in the energy transition of public lighting

Although the street lighting energy transition has many benefits, it is not without challenges and considerations. Here are some of the challenges we face:

8.1. High upfront costs

Implementing new lighting technologies, such as LEDs, can have high upfront costs. However, it is important to view these costs as a long-term investment. Energy savings and reductions in maintenance costs often offset the upfront costs.

8.2. Data managment

The transition to smart, connected lighting systems generates a significant amount of data. It is essential to have effective data management systems in place to collect, store and analyze this data in a secure and privacy-compliant manner.

8.3. Integration with existing infrastructures

Integrating new lighting technologies with existing infrastructure can pose technical challenges. It is important to take into account the specificities of each site and work closely with stakeholders for successful integration.

9. Conclusion and importance of adopting sustainable street lighting solutions

In conclusion, the energy transition in public lighting offers numerous technical strengths. Thanks to advances such as LED technology, remote management, time-dependent lighting profiles and solar lighting, it is possible to significantly reduce energy consumption, achieve financial savings and preserve the environment. 'environment.

However, the energy transition is not without challenges. It is important to consider upfront costs, manage data efficiently, and properly integrate new technologies with existing infrastructure.

By adopting sustainable public lighting solutions, we can contribute to reducing our ecological footprint, preserving resources and improving the quality of life in our cities. It is essential that decision-makers, designers and citizens work together to make the energy transition a reality.

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